Coffee machine



FIG. 1 is a perspective view of the front and one side of the design;

FIG. 2 is a front elevational view of the design;

FIG. 3 is a rear elevational view of the design;

FIG. 4 is a plan view of the top of the design;

FIG. 5 is a plan view of the bottom of the design;

FIG. 6 is an elevational view of one side of the design; and,

FIG. 7 is an elevational view of the other side of the design.

The broken lines in FIG. 5 are included for the purpose of illustration and form no part of the claimed design. 

The ornamental design for a “coffee machine,” as shown and described. 